With the fifth season of Stranger Things in the works, fans are on the edge of their seats for what the final season has in store. In Season 4, the group had fought hard against Vecna, the Mind Flayer's "five-star general". After he killed some local teenagers and attempted to kill Max Mayfield, the group did everything they could to try to put an end to Vecna's Curse. Nancy Wheeler did have a close call with Vecna while trying to figure out his backstory and how to stop him, but she was spared.
Source:https://www.cbr.com/stranger-things-steve-harrington-vecna-final-victim/